Texas-instruments TPS54810 Manual do Utilizador

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 20054-V TO 6-V INPUT, 8-A OUTPUT SYNCHRONOUS BUCK PWMSWITCHER WITH INTEGRATED FETS (SWIFT™)6,4 mm X

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com10AGNDBOOTVSENSECOMPPWRGDPHPHPHPHPHPHPHPHPHRTSYNCSS/ENAVBIASVINVINVINVINVINPGNDPGNDPGN

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com11LAYOUT CONSIDERATIONS FOR THERMALPERFORMANCEFor operation at full rated load current

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com12PERFORMANCE GRAPHS (FROM APPLICATION CIRCUIT SHOWN IN FIGURE 9)Figure 12IO − Output

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com13DETAILED DESCRIPTIONUnder Voltage Lock Out (UVLO)The TPS54810 incorporates an under

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com14particular application needs. Type 2 or type 3 compensa-tion can be employed using e

PACKAGING INFORMATIONOrderable Device Status(1)PackageTypePackageDrawingPins PackageQtyEco Plan(2)Lead/Ball Finish MSL Peak Temp(3)TPS54810PWP ACTIVE

TAPE AND REEL INFORMATION*All dimensions are nominalDevice PackageTypePackageDrawingPins SPQ ReelDiameter(mm)ReelWidthW1 (mm)A0(mm)B0(mm)K0(mm)P1(mm)W

*All dimensions are nominalDevice Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)TPS54810PWPR HTSSOP PWP 28 2000 367.0 367.0

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com2These devices have limited built-in ESD protection. The leads should be shorted toget

IMPORTANT NOTICETexas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and otherch

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com3ELECTRICAL CHARACTERISTICS TJ = −40°C to 125°C, VI = 4 V to 6 V unless otherwise no

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com4ELECTRICAL CHARACTERISTICS CONTINUEDTJ = −40°C to 125°C, VI = 4 V to 6 V unless oth

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com51234 5678910111213142827262524232221201918171615AGNDVSENSECOMPPWRGDBOOTPHPHPHPHPHPHPH

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com6FUNCTIONAL BLOCK DIAGRAMFallingEdgeDeglitchEnableComparator1.2 VVIN3.8 VHysteresis: 0

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com7TYPICAL CHARACTERISTICSFigure 10102030405060−40 −15 10 35 60 85 110 135VI = 5 V,IO =

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com8APPLICATION INFORMATIONFigure 9 shows the schematic diagram for a typicalTPS54810 app

TPS54810SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005www.ti.com9PCB LAYOUTFigure 10 shows a generalized PCB layout guide for theTPS54810The VIN pins